Spike marks: You are not allowed to touch spike marks until everyone in your group has completed the hole. On completion of the hole, spike marks should be repaired as good etiquette. for following groups.

The line of the putt: You can’t touch the line of your putt to test the grass or attempt to improve the line.

Casual water: Dew or frost do not constitute loose impediments, and therefore cannot be brushed away or mopped with a towel. However, if there’s casual water on your line, you’re entitled to relief under Rule 25-1.

Can’t stand on the line: You must not make a stroke with either foot touching the line of your putt, including an extension of that line behind the ball.